CD63 and egg allergy: The significant correlations between sIgE levels and the percentage of basophils with the expression of CD63 were shown in only patients with milk (r = 0.493, p = 0.011) or egg (r = 0.339, p = 0.028) allergy, while the correlations were not in the others without milk and egg allergy (Figure 1B,C,E,F).